CN111823460A - Vacuum automatic pressure gel process casting molding die structure of current transformer - Google Patents

Abstract

The invention relates to the technical field of current transformer molds, in particular to a casting mold structure for a current transformer vacuum automatic pressure gel process, wherein a fixed static mold is locked and fastened on the upper surface of a machine table heating plate through M12 bolts, one end of the static mold is connected with a vacuum pump through a vacuumizing pipe, a movable mold is arranged on one side of the static mold, one end of the movable mold is connected with an injection groove extension piece, the middle section of the injection groove extension piece is connected with a sealed conversion injection valve, a material receiving groove is arranged outside the injection groove extension piece, and an injection groove fixing plate and the material receiving groove are fastened at one end of a supporting seat through bolts. The invention utilizes the automatic pressure gel process equipment to rapidly open and close the mold and the vacuum degassing mode of the vacuum casting process to remove the gas in the mold cavity of the mold, thereby reducing the repeated preheating time of the mold, shortening the molding and curing time of the product, improving the cycle utilization times of the mold per day and greatly improving the daily yield of the product when the quality of the product is not changed.

Description

Vacuum automatic pressure gel process casting molding die structure of current transformer

Technical Field

The invention relates to the technical field of current transformer molds, in particular to a casting mold structure of a current transformer by a vacuum automatic pressure gel process.

Background

The current transformer is cast by mainly adopting a high-pressure vacuum casting process, and the process has the problems of long production period, more mold requirements, large mold investment and low daily output, and is difficult to meet the large-batch delivery requirements of customers.

The existing vacuum casting process for the current transformer production mode is completed by matching a plurality of independent segmentation processes, the mold filling/heating/casting distance is long, the number of participators is large, the curing time of a product after casting is as long as 12 hours, the mold is recycled for 2 times per day, and the daily output is improved under the influence of the number of the molds and the time of each process. Therefore, the technical personnel in the field provide a casting mold structure for the vacuum automatic pressure gel process of the current transformer, so as to solve the problems in the background technology.

Disclosure of Invention

The invention aims to provide a casting mold structure for a current transformer by a vacuum automatic pressure gel process, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a casting forming die structure of a current transformer in a vacuum automatic pressure gel process comprises a machine table heating plate, wherein the upper surface of the machine table heating plate is fixedly locked by an M12 bolt, one end of the static die is connected with a vacuum pump through a vacuum pumping pipe, a movable die is arranged on one side of the static die, one end of the movable die is connected with a material injection groove extension piece, the middle section of the material injection groove extension piece is connected with a sealing conversion material injection valve, a material receiving groove is arranged outside the material injection groove extension piece, a material injection groove fixing plate and the material receiving groove are fastened on one end of a supporting seat through bolts, a rubber tube anti-falling interface is embedded and fixed on one side of the supporting seat, a material injection groove fixing plate is fixed on the other end of the supporting seat, a material guide tube is sleeved outside the rubber tube anti-falling interface, and the other;

the static mould comprises a static mould mounting plate, a static mould part is assembled on the inner side of the static mould mounting plate through bolts, a static mould cavity is formed in the inner side of the static mould part, a vacuumizing mould head communicated with the static mould cavity is screwed at a position, corresponding to a vacuumizing pipe, of one side of the static mould part, a first runner Teflon heat insulation insert communicated with the static mould cavity is formed at a position, corresponding to a material injection groove extension part, of the other side of the static mould part, a first current transformer extension line groove communicated with the static mould cavity is formed in the inner side of the static mould part, current transformer fixing mould head bolt holes are symmetrically formed in positions, located at two sides of the end part of the first current transformer extension line groove, of the inner side of the static mould part, four positioning guide columns which are distributed in a rectangular shape are fixed on the inner side of the static mould part, and a mould head fixing magnet extending into the static mould cavity is embedded in a position, and the inner side of the static mould element is provided with a parting surface double sealing groove;

the movable die comprises a movable die mounting plate, a movable die part matched with the movable die mounting plate is assembled at a position, corresponding to the static die, of the inner side of the movable die mounting plate through a bolt, a movable die cavity is formed at a position, corresponding to a static die cavity, of the inner side of the movable die part, a second current transformer extension wire groove is formed at a position, corresponding to a first current transformer extension wire groove, of the inner side of the movable die part, a positioning sleeve connected with the movable die part in a sleeved mode is fixed at a position, corresponding to a positioning guide pillar, of the inner side of the movable die part, and a second runner Teflon heat insulation insert is formed at a position, corresponding to a first runner Teflon heat;

the movable die cavity and the static die cavity are combined to form a complete die cavity, inserts are placed in the die cavity and comprise an upper conductor protection die head, an arc-shaped forming die head, a lower conductor protection die head, a die head connecting screw rod, a current transformer fixing die head, a current transformer fixing clamping point die head, a conductor insert protection die head, a conductor insert and symmetrically placed current transformer coils, the upper conductor protection die head and the lower conductor protection die head are locked through the die head connecting screw rod, the conductor insert is assembled on one side of the upper conductor protection die head and one side of the lower conductor protection die head, the conductor insert protection die head is sleeved outside the conductor insert, the arc-shaped forming die head is assembled at one end of the die cavity, and the current transformer fixing die head is screwed into a current transformer fixing die head bolt hole through a bolt.

As a further aspect of the invention: the outer side of the static mold cavity corresponds to the positions of the two current transformer coils and is provided with five first current transformer fixing clamping point grooves, the outer side of the movable mold cavity corresponds to the positions of the five first current transformer fixing clamping point grooves and is provided with second current transformer fixing clamping point grooves, the current transformer fixing clamping point die head is inserted into the inner sides of the first current transformer fixing clamping point grooves and the second current transformer fixing clamping point grooves, and the end parts of the current transformer fixing clamping point die heads are abutted against the current transformer coils respectively.

As a further aspect of the invention: the vacuumizing die head comprises a tube body, one end of the tube body is provided with an anti-falling air pipe connector connected with the vacuumizing tube, a second limiting step is fixedly sleeved outside the tube body, an end face sealing groove is formed in the outer portion of one end, connected with the static die, of the tube body, and a step end face sealing groove is formed in one side of the second limiting step.

As a further aspect of the invention: the protection die head on the conductor comprises a first module, wherein a thread hole is formed in the first module, a first broken vacuum vent hole in a cross-shaped structure is formed in one side position, located in the thread hole, of the inner side of the first module, a second side sealing groove is formed in the middle position, located in the outer side of the first module, a third limiting step is formed in the lower position, located in the second side sealing groove, of the outer side of the first module, a first side sealing groove is formed in the lower position, located in the third limiting step, of the outer side of the first module, and a first end face sealing groove is symmetrically formed in the bottom of the first module.

As a further aspect of the invention: the lower protection die head for the conductor comprises a second module, wherein a bolt connecting through hole is formed in the second module, a second vacuum breaking vent hole in a cross-shaped structure is formed in one side position, located on the bolt connecting through hole, in the second module, a fourth side sealing groove is formed in the outer side of the second module, a fourth limiting step is formed in the position, located below the fourth side sealing groove, in the outer side of the second module, a third side sealing groove is formed in the position, located below the fourth limiting step, in the outer side of the second module, and a second end face sealing groove is symmetrically formed in the bottom of the second module.

As a further aspect of the invention: sealed conversion notes material valve includes and annotates the pipe box that material groove extension piece both ends link to each other, the inside of pipe box is run through there is rotatory mobile jib, the one end of rotatory mobile jib is provided with rotatory handle, and has seted up gag lever post hole and pouring feed port on the rotatory mobile jib respectively, the inboard in gag lever post hole is inserted and is equipped with the gag lever post, the inside of pipe box is located both ends position department and all is provided with the hole seal groove, and the top of pipe box has seted up notes material mouth fixed slot, first spacing step has been seted up to the bottom of pipe box.

As a further aspect of the invention: a casting molding die structure of a current transformer by a vacuum automatic pressure gel process comprises the following operation steps:

step 1, fixing a movable die and a static die on a machine table template to realize quick die opening and closing;

step 2, opening the machine to heat and control the temperature of the die to 140 ℃;

step 3, controlling the vacuum degree of the cavity by connecting the vacuumizing die head with a vacuum pump;

step 4, preparing the production material in advance according to the formula process, moving the material moving tank to the side of the machine station, and connecting the material moving tank with a mold material injection groove for standby;

step 5, installing the current transformer and the copper conductor insert which are assembled according to the process requirements into a mold cavity;

step 6, starting a machine control button to close the die according to requirements, and rotating the sealing conversion injection valve 11 to a closed state;

step 7, starting a vacuum pump to vacuumize the mold cavity, continuously pumping for 5-10 minutes until the vacuum is lower than 5mbar, closing the vacuum pump to check whether the mold cavity leaks air, and then breaking the vacuum degree of the mold cavity to 10-20 mbar;

step 8, rotating the sealing conversion injection valve to start injecting materials; after the observation material overflows from the vacuumizing tube, holding the pipeline, closing the vacuum pump, and stopping vacuumizing;

and 9, maintaining the pressure for 30 minutes, and then deflating and opening the mold.

Compared with the prior art, the invention has the beneficial effects that: the invention utilizes the automatic pressure gel process equipment to rapidly open and close the mold and the vacuum degassing mode of the vacuum casting process to remove the gas in the mold cavity of the mold, thereby reducing the repeated preheating time of the mold, shortening the molding and curing time of the product, improving the cycle utilization times of the mold per day and greatly improving the daily yield of the product when the quality of the product is not changed.

Drawings

FIG. 1 is a schematic structural diagram of a casting mold structure of a current transformer by a vacuum automatic pressure gel process;

FIG. 2 is a schematic structural diagram of a stationary mold in a casting mold structure of a current transformer by a vacuum automatic pressure gel process;

FIG. 3 is a schematic structural diagram of a movable mold in a casting mold structure of a current transformer in a vacuum automatic pressure gel process;

FIG. 4 is a schematic structural diagram of an insert in a casting mold structure of a current transformer by a vacuum automatic pressure gel process;

FIG. 5 is a schematic structural diagram of a vacuum-pumping die head in a casting mold structure of a current transformer by a vacuum automatic pressure gel process;

FIG. 6 is a schematic structural view of a protective die head on a conductor in a casting mold structure of a current transformer by a vacuum automatic pressure gel process;

FIG. 7 is a schematic structural view of a lower protection die head of a conductor in a casting mold structure of a current transformer by a vacuum automatic pressure gel process;

FIG. 8 is a schematic structural view of a sealing conversion injection valve in a casting mold structure of a current transformer in a vacuum automatic pressure gel process;

fig. 9 is a schematic structural view of a finished product after injection molding of a vacuum automatic pressure gel process casting mold structure of a current transformer.

In the figure: 1. a material injection groove fixing plate; 2. the rubber tube anti-drop interface; 3. a supporting seat; 4. a material receiving groove; 5. a material injection groove extension piece; 6. a vacuum pump; 7. vacuumizing a tube; 8. a movable die mounting plate; 9. a static mould mounting plate; 10. a machine table heating plate; 11. sealing the conversion injection valve; 110. pipe sleeve; 111. an inner hole sealing groove; 112. pouring a feeding hole; 113. a material injection nozzle fixing groove; 114. rotating the main rod; 115. rotating the handle; 116. a limit rod hole; 117. a first limit step; 12. a material transfer tank; 13. a material guide pipe; 14. a stationary mold part; 15. parting surface double sealing grooves; 16. vacuumizing the die head; 161. a pipe body; 162. an end face seal groove; 163. a step end face sealing groove; 164. a second limit step; 165. an anti-drop trachea interface; 17. a first current transformer extension wire slot; 18. positioning the guide post; 19. a current transformer fixes a die head bolt hole; 20. a static mold cavity; 21. a first current transformer fixing clamping point slot; 22. a first runner teflon heat insulation insert; 23. fixing a magnet on the die head; 24. a movable model cavity; 25. a positioning sleeve; 26. a second runner teflon heat insulation insert; 27. the second current transformer extends the wire slot; 28. the second current transformer fixes the point slot; 29. fixing a die head by a current transformer; 30. a protective die head on the conductor; 301. a first end face seal groove; 302. a first side seal groove; 303. a third limiting step; 304. a second side seal groove; 305. a first vacuum-breaking vent hole; 306. a thread hole; 307. a first module; 31. an arc-shaped forming die head; 32. a lower conductor protection die head; 321. a second module; 322. a second end face seal groove; 323. a third side seal groove; 324. a fourth limit step; 325. a fourth side seal groove; 326. a second vacuum breaking vent hole; 327. the bolt is connected with the through hole; 33. the die head is connected with a screw rod; 34. the current transformer fixes the clamping point die head; 35. a conductor insert protection die head; 36. a current transformer coil; 37. a conductor insert; 38. a current transformer extension line; 39. and (3) epoxy resin.

Detailed Description

Referring to fig. 1 to 9, in an embodiment of the present invention, a casting mold structure for a current transformer by vacuum automatic pressure gel process includes a machine heating plate 10, a stationary mold is locked and fixed on an upper surface of the machine heating plate 10 by M12 bolts, one end of the stationary mold is connected to a vacuum pump 6 by a vacuum tube 7, and one side of the static mould is provided with a movable mould, one end of the movable mould is connected with a material injection groove extension piece 5, the middle section of the material injection groove extension piece 5 is connected with a sealed conversion material injection valve 11, and the material receiving groove 4 is arranged outside the material injection groove extension piece 5, the material injection groove fixing plate 1 and the material receiving groove 4 are fastened at one end of the supporting seat 3 through bolts, a rubber tube anti-drop connector 2 is embedded and fixed at one side of the supporting seat 3, a material injection groove fixing plate 1 is fixed at the other end of the supporting seat 3, a material guide pipe 13 is sleeved outside the rubber tube anti-falling connector 2, and a material moving tank 12 is connected with the other end of the material guide pipe 13;

the static mould comprises a static mould mounting plate 9, a static mould 14 is assembled on the inner side of the static mould mounting plate 9 through bolts, a static mould cavity 20 is formed in the inner side of the static mould 14, a vacuumizing mould head 16 communicated with the static mould cavity 20 is screwed at the position, corresponding to a vacuumizing pipe 7, of one side of the static mould 14, a first runner Teflon heat insulation insert 22 communicated with the static mould cavity 20 is formed at the position, corresponding to a material injection groove extension piece 5, of the other side of the static mould 14, a first current transformer extension line slot 17 communicated with the static mould cavity 20 is formed in the inner side of the static mould 14, current transformer fixing mould head bolt holes 19 are symmetrically formed in the two sides of the end part of the first current transformer extension line slot 17 in the inner side of the static mould 14, four positioning guide columns 18 which are distributed in a rectangular shape are fixed on the inner side of the static mould 14, a mould head fixing magnet 23 extending into the static mould cavity 20 is embedded in the position, of one side of the static, and the inner side of the static mould 14 is provided with a parting surface double sealing groove 15;

the movable mould comprises a movable mould mounting plate 8, a movable mould part matched with the movable mould mounting plate is assembled at the position, corresponding to the static mould 14, of the inner side of the movable mould mounting plate 8 through bolts, a movable mould cavity 24 is formed at the position, corresponding to the static mould cavity 20, of the inner side of the movable mould part, a second current transformer extension wire slot 27 is formed at the position, corresponding to the first current transformer extension wire slot 17, of the inner side of the movable mould part, a positioning sleeve 25 connected with the inner side of the movable mould part in a sleeved mode is fixed at the position, corresponding to the positioning guide pillar 18, of the inner side of the movable mould part, and a second runner Teflon heat insulation insert 26 is formed at the position, corresponding to;

the movable die cavity 24 and the static die cavity 20 are combined to form a complete die cavity, inserts are placed in the die cavity and comprise an upper conductor protection die head 30, an arc-shaped forming die head 31, a lower conductor protection die head 32, a die head connecting screw rod 33, a current transformer fixing die head 29, a current transformer fixing clamping point die head 34, a conductor insert protection die head 35, a conductor insert 37 and symmetrically placed current transformer coils 36, the upper conductor protection die head 30 and the lower conductor protection die head 32 are locked through the die head connecting screw rod 33, the conductor insert 37 is assembled on one side of the upper conductor protection die head 30 and one side of the lower conductor protection die head 32, the conductor insert protection die head 35 is sleeved outside the conductor insert 37, the arc-shaped forming die head 31 is assembled at one end of the die cavity, and the current transformer fixing die head 29 is screwed into a current transformer fixing die head.

Further, five first current transformer fixing clamping point grooves 21 are formed in the positions, corresponding to the two current transformer coils 36, of the outer side of the static mold cavity 20, second current transformer fixing clamping point grooves 28 are formed in the positions, corresponding to the five first current transformer fixing clamping point grooves 21, of the outer side of the movable mold cavity 24, the current transformer fixing clamping point die heads 34 are inserted into the inner sides of the first current transformer fixing clamping point grooves 21 and the second current transformer fixing clamping point grooves 28, and the end portions of the current transformer fixing clamping point die heads 34 are abutted to the current transformer coils 36 respectively.

Further, the vacuum pumping die head 16 comprises a pipe body 161, one end of the pipe body 161 is provided with an anti-dropping air pipe connector 165 connected with the vacuum pumping pipe 7, a second limiting step 164 is fixedly sleeved outside the pipe body 161, an end face sealing groove 162 is formed outside one end of the pipe body 161 connected with the static module 14, and a step end face sealing groove 163 is formed in one side of the second limiting step 164.

Further, the protection die head 30 on the conductor includes a first module 307, a thread hole 306 is disposed inside the first module 307, a first vacuum vent 305 in a cross-shaped structure is disposed at a position on one side of the thread hole 306 on the inner side of the first module 307, a second side sealing groove 304 is disposed at a position on the outer side of the first module 307 in the middle section, a third limiting step 303 is disposed at a position on the outer side of the first module 307 below the second side sealing groove 304, a first side sealing groove 302 is disposed at a position on the outer side of the first module 307 below the third limiting step 303, and first end face sealing grooves 301 are symmetrically disposed at the bottom of the first module 307.

Further, the lower conductor protection die head 32 includes a second block 321, a bolt connection through hole 327 is provided inside the second block 321, a second vacuum breaking vent 326 having a cross-shaped structure is provided at a position of one side of the bolt connection through hole 327 inside the second block 321, a fourth side sealing groove 325 is provided at the outer side of the second block 321, a fourth limiting step 324 is provided at a position of the outer side of the second block 321 below the fourth side sealing groove 325, a third side sealing groove 323 is provided at a position of the outer side of the second block 321 below the fourth limiting step 324, and a second end face sealing groove 322 is symmetrically provided at the bottom of the second block 321.

Further, sealed conversion notes material valve 11 includes the pipe box 110 that links to each other with annotating the material groove extension 5 both ends, the inside of pipe box 110 runs through there is rotatory mobile jib 114, the one end of rotatory mobile jib 114 is provided with rotatory handle 115, and seted up gag lever post hole 116 and pouring feed port 112 on the rotatory mobile jib 114 respectively, the inboard of gag lever post hole 116 is inserted and is equipped with the gag lever post, the inside of pipe box 110 is located both ends position department and all is provided with hole seal groove 111, and annotate material mouth fixed slot 113 has been seted up to the top of pipe box 110, first spacing step 117 has been seted up to the bottom of pipe box 110.

Further, a casting mold structure of a current transformer by a vacuum automatic pressure gel process comprises the following operation steps:

step 1, fixing a movable die and a static die on a machine table template to realize quick die opening and closing;

step 2, opening the machine to heat and control the temperature of the die to 140 ℃;

step 3, connecting the vacuumizing die head 16 with a vacuum pump 6 to control the vacuum degree of the cavity;

step 4, preparing the production material in advance according to the formula process, moving the material moving tank 12 to the side of the machine station, and connecting a mold material injection groove for standby;

step 5, installing the current transformer and the copper conductor insert which are assembled according to the process requirements into a mold cavity;

step 6, starting a machine control button to close the die according to requirements, and rotating the sealing conversion injection valve 11 to a closed state;

step 7, starting a vacuum pump 6 to vacuumize the mold cavity, continuously pumping for 5-10 minutes until the vacuum is lower than 5mbar, closing the vacuum pump 6 to check whether the mold cavity leaks air, and then breaking the vacuum degree of the mold cavity to 10-20 mbar;

step 8, rotating the seal conversion injection valve 11 to start injecting; after the observation material overflows from the vacuumizing tube 7, the pipeline is held back, the vacuum pump 6 is closed, and vacuumizing is stopped;

and 9, maintaining the pressure for 30 minutes, and then deflating and opening the mold.

In summary, the following steps: the invention utilizes the automatic pressure gel process equipment to rapidly open and close the mold and the vacuum degassing mode of the vacuum casting process to remove the gas in the mold cavity of the mold, thereby reducing the repeated preheating time of the mold, shortening the molding and curing time of the product, improving the cycle utilization times of the mold per day and greatly improving the daily yield of the product when the quality of the product is not changed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims (10)

1. A casting molding die structure of a current transformer vacuum automatic pressure gel process comprises a machine table heating plate (10) and is characterized in that the upper surface of the machine table heating plate (10) is fixedly provided with a stationary die through an M12 bolt lock, one end of the stationary die is connected with a vacuum pump (6) through a vacuumizing pipe (7), one side of the stationary die is provided with a movable die, one end of the movable die is connected with an injection groove extension piece (5), the middle section of the injection groove extension piece (5) is connected with a sealed conversion injection valve (11), a material receiving groove (4) is arranged outside the injection groove extension piece (5), a material injection groove fixing plate (1) and the material receiving groove (4) are both fixedly arranged at one end of a supporting seat (3) through bolts, one side of the supporting seat (3) is fixedly embedded with a rubber pipe anti-falling interface (2), and the other end of the supporting seat (3) is fixedly provided with a material injection groove fixing, the rubber tube anti-drop connector (2) is sleeved with a material guide pipe (13), and the other end of the material guide pipe (13) is connected with a material moving tank (12).

2. The structure of a casting mold of a current transformer by vacuum automatic pressure gel process according to claim 1, characterized in that the static mold comprises a static mold mounting plate (9), the static mold (14) is assembled on the inner side of the static mold mounting plate (9) through bolts, a static mold cavity (20) is formed on the inner side of the static mold (14), a vacuumizing mold head (16) communicated with the static mold cavity (20) is screwed on one side of the static mold (14) corresponding to the position of the vacuumizing tube (7), a first runner teflon heat insulation insert (22) communicated with the static mold cavity (20) is formed on the other side of the static mold (14) corresponding to the position of the material injection groove extension piece (5), a first current transformer extension slot (17) communicated with the static mold cavity (20) is formed on the inner side of the static mold (14), and the inner side of the static mold (14) is symmetrically formed on two sides of the end of the first current transformer extension slot (17) The die head fixing device is characterized in that a current transformer is used for fixing a die head pin hole (19), four positioning guide columns (18) which are distributed in a rectangular shape are fixed on the inner side of a static die piece (14), a die head fixing magnet (23) which extends into a static die cavity (20) is embedded in the position, located on one side, of the inner side of the static die piece (14), and a parting surface double-sealing groove (15) is formed in the inner side of the static die piece (14).

3. The vacuum automatic pressure gelation process casting mold structure of claim 1, the movable mould is characterized by comprising a movable mould mounting plate (8), a movable mould matched with the movable mould mounting plate (8) is assembled on the inner side of the movable mould mounting plate (8) at a position corresponding to the static mould (14) through bolts, a movable mould cavity (24) is arranged at the position of the inner side of the movable mould part corresponding to the static mould cavity (20), and a second current transformer extension slot (27) is arranged at the position of the inner side of the movable mould part corresponding to the first current transformer extension slot (17), a positioning sleeve (25) which is connected with the inner side of the movable mould in a sleeved mode is fixed at the position, corresponding to the positioning guide post (18), of the inner side of the movable mould, and a second runner Teflon heat insulation insert (26) is arranged at the position, corresponding to the first runner Teflon heat insulation insert (22), of one side of the movable mold component.

4. The structure of a current transformer casting mold with vacuum automatic pressure gel process according to claim 3, characterized in that the movable mold cavity (24) and the stationary mold cavity (20) are combined to form a complete mold cavity, an insert is placed in the mold cavity, the insert comprises an upper conductor protection mold head (30), an arc-shaped molding mold head (31), a lower conductor protection mold head (32), a mold head connecting screw (33), a current transformer fixing mold head (29), a current transformer fixing clamping point mold head (34), a conductor insert protection mold head (35), a conductor insert (37) and symmetrically placed current transformer coils (36), the upper conductor protection mold head (30) and the lower conductor protection mold head (32) are locked by the mold head connecting screw (33), and the upper conductor protection mold head (30) and one side of the lower conductor protection mold head (32) are provided with the conductor insert (37), the conductor insert protection die head (35) is sleeved outside the conductor insert (37), the arc-shaped forming die head (31) is assembled at one end of the die cavity, and the current transformer fixing die head (29) is screwed into the current transformer fixing die head bolt hole (19) through a bolt.

5. The structure of a casting mold for current transformer vacuum automatic pressure gel process according to claim 2, wherein five first current transformer fixing clamping point grooves (21) are formed in the outer side of the static mold cavity (20) corresponding to the positions of two current transformer coils (36), second current transformer fixing clamping point grooves (28) are formed in the outer side of the dynamic mold cavity (24) corresponding to the positions of the five first current transformer fixing clamping point grooves (21), the current transformer fixing clamping point die head (34) is inserted into the inner sides of the first current transformer fixing clamping point groove (21) and the second current transformer fixing clamping point groove (28), and the end of the current transformer fixing clamping point die head (34) is abutted against the current transformer coils (36).

6. The vacuum automatic pressure gel process casting mold structure of the current transformer according to claim 3, wherein the vacuum-pumping die head (16) comprises a tube body (161), one end of the tube body (161) is provided with an anti-dropping air pipe connector (165) connected with the vacuum-pumping pipe (7), a second limit step (164) is fixedly sleeved outside the tube body (161), an end face sealing groove (162) is formed outside one end of the tube body (161) connected with the static module (14), and a step end face sealing groove (163) is formed in one side of the second limit step (164).

7. The vacuum automatic pressure gelation process casting mold structure of claim 4, characterized in that the on-conductor protection die head (30) comprises a first module (307), a thread hole (306) is arranged inside the first module (307), and a first vacuum breaking vent hole (305) in a cross-shaped structure is arranged at one side position of the screw thread hole (306) at the inner side of the first module (307), a second side surface sealing groove (304) is arranged at the middle section position of the outer side of the first module (307), and the outer side of the first module (307) is provided with a third limit step (303) at the position below the second side surface sealing groove (304), a first side face sealing groove (302) is arranged at the position, below the third limiting step (303), of the outer side of the first module (307), and the bottom of the first module (307) is symmetrically provided with a first end face sealing groove (301).

8. The vacuum automatic pressure gelation process casting mold structure of claim 4, characterized in that the lower conductor protection die head (32) comprises a second module (321), a bolt connecting through hole (327) is arranged inside the second module (321), and a second vacuum breaking vent hole (326) with a cross-shaped structure is arranged at one side position of the bolt connecting through hole (327) in the second module (321), a fourth side surface sealing groove (325) is arranged on the outer side of the second module (321), and a fourth limit step (324) is arranged at the position, below the fourth side sealing groove (325), of the outer side of the second module (321), a third lateral sealing groove (323) is arranged at the position, below the fourth limit step (324), of the outer side of the second module (321), and the bottom of the second module (321) is symmetrically provided with a second end surface sealing groove (322).

9. The vacuum automatic pressure gel process casting mold structure of the current transformer according to claim 1, wherein the sealing conversion injection valve (11) comprises a pipe sleeve (110) connected with two ends of the injection groove extension piece (5), a rotating main rod (114) penetrates through the pipe sleeve (110), one end of the rotating main rod (114) is provided with a rotating handle (115), the rotating main rod (114) is respectively provided with a limiting rod hole (116) and a casting feeding hole (112), a limiting rod is inserted into the inner side of the limiting rod hole (116), inner hole sealing grooves (111) are formed in positions, located at two ends, of the inside of the pipe sleeve (110), an injection nozzle fixing groove (113) is formed above the pipe sleeve (110), and a first limiting step (117) is formed at the bottom of the pipe sleeve (110).

10. The structure of a casting mold for current transformer vacuum automatic pressure gel process according to any one of claims 1-9, characterized by comprising the following steps:

step 1, fixing a movable die and a static die on a machine table template to realize quick die opening and closing;

step 2, opening the machine to heat and control the temperature of the die to 140 ℃;

step 3, connecting a vacuum pump (6) through a vacuumizing die head (16) to control the vacuum degree of the cavity;

step 4, preparing the production material in advance according to the formula process, moving the material moving tank (12) beside the machine station, and connecting the material moving tank with a mold material injection groove for standby;

step 5, installing the current transformer and the copper conductor insert which are assembled according to the process requirements into a mold cavity;

step 6, starting a machine control button to close the die according to requirements, and rotating the sealing conversion injection valve (11) to a closed state;

step 7, starting a vacuum pump (6) to vacuumize the die cavity of the die, continuously vacuumizing for 5-10 minutes until the vacuum is lower than 5mbar, closing the vacuum pump (6) to check whether the die cavity leaks air, and then, breaking the vacuum degree of the die cavity to 10-20 mbar;

step 8, rotating a seal conversion material injection valve (11) to start material injection; after the observation material overflows from the vacuumizing tube (7), the pipeline is held, the vacuum pump (6) is closed, and vacuumizing is stopped;

and 9, maintaining the pressure for 30 minutes, and then deflating and opening the mold.

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